<template>
  <div>
    <!-- <h3>添加商品</h3> -->
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 试图容器 -->
    <el-card>
      <!-- 警告条 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        show-icon
      >
      </el-alert>
      <!--步骤条  -->
      <!-- align-center 居中效果 -->
      <!--  :active="0" 默认选中第1个 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域:el-tab-pane必须是el-tabs的子节点
        :tab-position="'left'"(设置tab栏为左右结构tab栏) -->
      <!-- 表单：label-position="'top'"(设置label在文本框上方) -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 级联选择框 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <!--  -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.id"
            >
              <!-- 多选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 上传图片 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerObj"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
              <!-- 富文本编辑器 -->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <!-- 添加商品的按钮 -->
              <el-button  type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>

    </el-card>
    <!-- 预览图片 -->
    <el-dialog title="预览图片" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
    
  </div>
</template>
<script>
// 导入 lodash 包
import _ from 'lodash'

export default {
  data() {
    return {
      // 默认选中项
      activeIndex: "0",
      // 添加商品表单数据
      addForm: {
        // 商品名称
        goods_name: "",
        //商品价格
        goods_price: 0,
        // 商品重量
        goods_weight: 0,
        // 商品数量
        goods_number: 0,
        // 商品参数列表
        goods_cat: [1, 3, 6],
        // 图片数组
        pics: [],
        // 商品详情
        goods_introduce:'',
        // 商品的参数 包含动态参数 和静态属性
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品单价", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      // 商品分类列表
      catelist: [],

      //
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        expandTrigger: "hover",
      },
      // 动态参数列表
      manyTableData: [],
      // 静态参数列表
      onlyTableData: [],
      // 上传图片的地址

      //上传图片的url地址
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头对象
      headerObj: { Authorization: window.sessionStorage.getItem("token") },
      //保存预览图片的url地址
      previewPath: "",
      //控制预览图片对话框的显示和隐藏
      previewVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  computed: {
    //计算属性
    // 获取三级商品分类的id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
  methods: {
    //获取所有商品分类
    async getCateList() {
      const { data: res } = await this.$http.get(`categories`);
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类列表失败");
      }

      this.catelist = res.data;
      // console.log(this.catelist);
    },
    // 级联选择框的选择项 发生变化 就会触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // 标签页切换之前 判断 是否选中三级商品分类 没选中就提示错误的消息
    // 选中三级商品分类 才开一切换标签页
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将进入的标签页' + oldActiveName);
      // console.log('即将离开的标签页' + activeName);
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类");
        return false;
      }
      
    },
    // 点击标签页
    async tabClicked() {
      // 证明访问的是 动态面板
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("获取参数列表失败");
        }

        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        // 把获取到的res.data值赋值给manyTableData动态参数列表
        this.manyTableData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性失败");
        }
        // 把获取到的res.data值赋值给onlyTableData静态属性数列表
        this.onlyTableData = res.data;
        // console.log(this.onlyTableData);
      }
    },
    // 预览图片
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    // 移除图片
    handleRemove(file) {
      // 获取要删除商品的路径
      const filePath = file.response.data.tmp_path;
      // 2.从pics数组中 找到图片对应的索引
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      // 3.调用数组 splice方法 把图片信息从数组中移除
      this.addForm.pics.splice(i, 1);
    },
    // 监听图片上传的信息
    handleSuccess(response) {
      // 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      // 2.将图片信息对象 push 到pics数组中

      this.addForm.pics.push(picInfo);
    //   console.log(this.addForm);
    },
    // 点击按钮添加商品
    add(){
        this.$refs.addFormRef.validate(async valid  =>{
            if(!valid){
                return this.$message.error('请填写必要的表单项')
            }

            // 执行添加的业务逻辑
            const form = _.cloneDeep(this.addForm)
            form.goods_cat= form.goods_cat.join(',')
            // console.log(form);
            // 处理动态参数
            this.manyTableData.forEach(item =>{
                const newInfo={
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newInfo)
            })
            // 处理静态属性
            this.onlyTableData.forEach(item =>{
                const newInfo ={
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals
                }
                 this.addForm.attrs.push(newInfo)
            })
            form.attrs=this.addForm.attrs
            console.log(form);

            // 发送请求添加商品
            // 商品的名称必须是唯一的
            const { data :res} = await this.$http.post('goods',form)
            if(res.meta.status !==201){
                return this.$message.error('添加商品失败')
            }
            this.$message.success('添加商品成功')
            this.$router.push('/goods')
            
        })
    }
  },
};
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0;
}
.previewImg {
  width: 100%;
}
.btnAdd {
    margin-top: 15px;
}
</style>